901
FNCA52 TJSJ 120730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST TUE MAY 12 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-122000-
SOUTHEAST COASTAL PLAINS-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 89 (+1) 72 (-2) 89
RH % (24H TREND) 51 (+2) 90 (+4) 51
WIND 20FT/EARLY(MPH) E 14 E 12 E 16
WIND 20FT/LATE(MPH) SE 14 E 11 SE 16
MIXING HGT(FT-AGL/MSL)5340 5260
TRANSPORT WND (MPH) E 16 SE 17
VENT RATE (KT-FT) 74760 78900
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-122000-
SOUTHERN HILLS-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30
TEMP (24H TREND) 86 (+2) 68 (-3) 86
RH % (24H TREND) 62 (+1) 98 (+6) 61
WIND 20FT/EARLY(MPH) E 13 E 12 E 13
WIND 20FT/LATE(MPH) SE 12 E 12 SE 13
MIXING HGT(FT-AGL/MSL)6050 6250
TRANSPORT WND (MPH) E 15 SE 17
VENT RATE (KT-FT) 78650 93750
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-122000-
NORTH COASTAL PLAINS-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 70
TEMP (24H TREND) 89 (0) 71 (-3) 91
RH % (24H TREND) 58 (-1) 97 (+4) 55
WIND 20FT/EARLY(MPH) E 13 E 13 E 14
WIND 20FT/LATE(MPH) E 18 SE 12 E 16
MIXING HGT(FT-AGL/MSL)5800 6620
TRANSPORT WND (MPH) E 14 SE 15
VENT RATE (KT-FT) 69600 86060
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-122000-
NORTHERN HILLS-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 0 70
TEMP (24H TREND) 89 (+1) 69 (-2) 91
RH % (24H TREND) 60 (+2) 97 (+3) 54
WIND 20FT/EARLY(MPH) E 11 E 11 SE 12
WIND 20FT/LATE(MPH) E 14 SE 9 SE 14
MIXING HGT(FT-AGL/MSL)6330 7230
TRANSPORT WND (MPH) E 12 SE 13
VENT RATE (KT-FT) 63300 79530
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-122000-
WEST COAST-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 30
TEMP (24H TREND) 90 (0) 72 (-1) 91
RH % (24H TREND) 59 (+1) 96 (+4) 57
WIND 20FT/EARLY(MPH) E 13 SE 13 SE 16
WIND 20FT/LATE(MPH) SE 13 E 13 SE 16
MIXING HGT(FT-AGL/MSL)5340 5720
TRANSPORT WND (MPH) E 12 SE 17
VENT RATE (KT-FT) 53400 85800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-122000-
EASTERN INTERIOR-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 30
TEMP (24H TREND) 87 (+1) 69 (-3) 88
RH % (24H TREND) 61 (-1) 98 (+3) 60
WIND 20FT/EARLY(MPH) E 16 E 13 SE 13
WIND 20FT/LATE(MPH) E 13 SE 13 SE 14
MIXING HGT(FT-AGL/MSL)6670 6700
TRANSPORT WND (MPH) SE 15 SE 16
VENT RATE (KT-FT) 86710 93800
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-122000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 30
TEMP (24H TREND) 82 (+3) 68 (-3) 83
RH % (24H TREND) 69 (-3) 99 (+2) 68
WIND 20FT/EARLY(MPH) E 13 E 10 SE 12
WIND 20FT/LATE(MPH) E 12 E 11 SE 13
MIXING HGT(FT-AGL/MSL)4800 4850
TRANSPORT WND (MPH) SE 16 SE 18
VENT RATE (KT-FT) 67200 77600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-122000-
CENTRAL MOUNTAIN RANGE-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 0 50
TEMP (24H TREND) 86 (+3) 66 (-3) 87
RH % (24H TREND) 63 (+2) 98 (+4) 59
WIND 20FT/EARLY(MPH) E 9 SE 9 SE 11
WIND 20FT/LATE(MPH) SE 9 SE 9 SE 11
MIXING HGT(FT-AGL/MSL)6890 7220
TRANSPORT WND (MPH) E 12 SE 14
VENT RATE (KT-FT) 68900 86640
DISPERSION 5 5
DSI 5 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-122000-
CAYEY MOUNTAIN RANGE-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 30
TEMP (24H TREND) 82 (+1) 68 (-2) 82
RH % (24H TREND) 68 (0) 100 (+2) 68
WIND 20FT/EARLY(MPH) E 11 E 9 SE 11
WIND 20FT/LATE(MPH) E 11 E 10 SE 11
MIXING HGT(FT-AGL/MSL)5550 5290
TRANSPORT WND (MPH) E 15 SE 17
VENT RATE (KT-FT) 72150 79350
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-122000-
VIEQUES-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 20
TEMP (24H TREND) 86 (0) 74 (-2) 88
RH % (24H TREND) 62 (-3) 91 (+1) 62
WIND 20FT/EARLY(MPH) E 17 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 17 SE 16
MIXING HGT(FT-AGL/MSL)3620 3530
TRANSPORT WND (MPH) E 20 E 22
VENT RATE (KT-FT) 61540 67070
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-122000-
CULEBRA-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 10
TEMP (24H TREND) 89 (+2) 76 (-1) 89
RH % (24H TREND) 60 (-6) 91 (+4) 60
WIND 20FT/EARLY(MPH) E 18 E 16 E 17
WIND 20FT/LATE(MPH) E 14 E 17 SE 16
MIXING HGT(FT-AGL/MSL)3580 3510
TRANSPORT WND (MPH) E 22 E 22
VENT RATE (KT-FT) 68020 66690
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-122000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 91 (+1) 73 (-2) 91
RH % (24H TREND) 48 (-1) 91 (+7) 48
WIND 20FT/EARLY(MPH) E 18 E 17 E 20
WIND 20FT/LATE(MPH) SE 19 E 17 SE 20
MIXING HGT(FT-AGL/MSL)5580 5350
TRANSPORT WND (MPH) E 18 SE 21
VENT RATE (KT-FT) 89280 96300
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-122000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10
TEMP (24H TREND) 86 (+1) 75 (-3) 86
RH % (24H TREND) 64 (-4) 92 (+6) 65
WIND 20FT/EARLY(MPH) E 18 E 17 E 17
WIND 20FT/LATE(MPH) E 16 E 17 SE 16
MIXING HGT(FT-AGL/MSL)3710 3490
TRANSPORT WND (MPH) E 22 E 21
VENT RATE (KT-FT) 70490 62820
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-122000-
ST CROIX-
330 AM AST TUE MAY 12 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 87 (+1) 74 (-2) 87
RH % (24H TREND) 64 (-3) 92 (+3) 65
WIND 20FT/EARLY(MPH) E 16 E 16 E 16
WIND 20FT/LATE(MPH) E 16 E 16 E 16
MIXING HGT(FT-AGL/MSL)4890 4760
TRANSPORT WND (MPH) E 18 SE 21
VENT RATE (KT-FT) 78240 85680
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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